<template>
  <view class="cart-container" v-if="cart.length !== 0">
    <!-- 收货地址组件 -->
    <my-address></my-address>
    
    <!-- 购物车商品列表的标题区域 -->
    <view class="cart-title">
      <!-- 左侧的图标 -->
      <uni-icons type="shop" size="18"></uni-icons>
      <!-- 描述文本 -->
      <text class="cart-title-text">购物车</text>
    </view>
    <!-- 循环渲染购物车里的信息 -->
  
   <uni-swipe-action>
     <block v-for="(goods, i) in cart" :key="i">
       <!-- uni-swipe-action-item 可以为其子节点提供滑动操作的效果。需要通过 options 属性来指定操作按钮的配置信息 -->
       <uni-swipe-action-item :right-options="options" @click="swipeActionClickHandler(goods)">
         <my-goods :goods="goods" :show-radio="true" :show-num="true" @radio-change="radioChangeHandler" @num-change="numberChangeHandler"></my-goods>
       </uni-swipe-action-item>
     </block>
   </uni-swipe-action>
   
   <!-- 使用自定义的结算组件 -->
   <my-settle></my-settle>
   
  </view>
   <!-- 空白购物车区域 -->
    <view class="empty-cart" v-else>
      <image src="/static/cart_empty@2x.png" class="empty-img"></image>
      <text class="tip-text">空空如也~</text>
    </view>
</template>

<script>
  import {
    mapState,
    mapMutations
  } from 'vuex'
  import badgeMix from '@/mixins/tabbar-badge.js'
  export default {
    mixins: [badgeMix],
    computed: {
      ...mapState('m_cart', ['cart'])
    },
    data() {
      return {
        options:[{
          text:'删除',
          style: {
                  backgroundColor: '#C00000' // 按钮的背景颜色
         }
        }]
      };
    },
    methods: {
      ...mapMutations('m_cart', ['updateGoodsState','updateGoodsCount','removeGoodsById']),
      // 商品的勾选状态发生了变化
      radioChangeHandler(e) {
        this.updateGoodsState(e)
        
      },
      numberChangeHandler(e) {
        this.updateGoodsCount(e)
        
      },
      // 点击了滑动操作按钮
       swipeActionClickHandler(goods) {
         this.removeGoodsById(goods.goods_id)
         
       }
    }
  }
</script>

<style lang="scss">
  .cart-title {
    height: 40px;
    display: flex;
    align-items: center;
    font-size: 14px;
    padding-left: 5px;
    border-bottom: 1px solid #efefef;

    .cart-title-text {
      margin-left: 10px;
    }
  }
  .cart-container{
    padding-bottom: 50px;
  }
  .empty-cart {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 150px;
  
    .empty-img {
      width: 90px;
      height: 90px;
    }
  
    .tip-text {
      font-size: 12px;
      color: gray;
      margin-top: 15px;
    }
  }
</style>